Grease cup



Mar. 20, 1923.

F. SMITH GREASE CUP Filed Dec. 5, 1921 E 5 ao 42 mmm@ Mattei' nePatented Mar. Ztl, i923..

i ai

FRANK SMITH, OF CHICAGO, LLINOIS.

GREASE CUP.

Application filed December 5, 1921. Serial lilo. 520,011.

To @ZZ 107mm it muy concern Be it known that l, FRANK SMITH, a citizenof. the United States, residing at Chicago, in the county ot Coole andState of illinois, have invented certain new and useful improvements inGrease Cups, of which the Jfollowing is a specification.

This invention relates to grease cups, and comprises a cup or casinghaving a plug mounted therein, the plug being adapted to feed the greaseto the machinery to be lubricated.

An object of the present invention is to provide means to retain theplug in position and prevent accidental displacement thereof. ln theform of the invention disclosed, the cup is provided with internalthreads adapted to be engaged by external threads formed on the plug,and alocking member is provided to prevent the plug from unscrewing.

rIhe locking member issecured to the plug by suitable means, and isadapted to revolve therewith but is capable ot limited longitudinalmovement with respect to the plug. To release the plug, it is firstnecessary to raise the locking member and a spring is provided tonormally retain the locking member in lowered position. The inventionfurther comprises means for lifting the locking member when the plug isto be released.

In the accompanying drawings, I have shown one embodiment of theinvention. In this showing:

Figure 1 is a side elevation of one Jform of a grease cup embodying theinvention,

Figure 2 is a yvertical sectional view,

Figure 3 is a horizontal sectional view on line 3 3 ot Figure 1, and,

Figure 4 is a detail view of the grease cup showing the partsdisassembled.

Referring to the drawings, the reference numeral 1 Vdesignates the bodyof the cup which is provided with external threads 2, at its lower end,and is adapted to be received in a member to be lubricated. The exterioris provided with a hexagonal portion 3 for the reception of a wrench orother tool to permit the cup to be fastened to the machine or other partto be lubricated. Above the hexagonal portion, the cup is arranged inthe form ot a cylinder It having internal threads 5. The grease isadapted to be received in the lower portion ot the cup, as indicated at6, and fed.

through the lower open end. A plug 7 is arranged within the cup, theplug being provided with external threads 8 adapted to engage theinternal threads of the cup. The bottom of the plug is closed by a plate9 and the upper end is closed by a plate 10, having a rectangularopening 11 formed therein.

A locking member extends through the rectangular opening in the plug. Asshown, the locking member comprises abody portion 12, having an opening13 in its lower end. The body portion of the locking member is hollowand is adapted to receive a bolt 14|: which is provided withscrewthreads 15 on its lower end adapted to be received in an opening inthe bottom of the plug. The end of the bolt may be flattened, as at 16,preventing it from becoming displaced. The bolt is surrounded by aspring 17 which tends to hold the locking member in the loweredposition. The upper end of the locking member is provided with a head 18in the form of anut, for the reception of the tool, and this head isprovided with an annular flange 19.y Arranged on the under side of thehead are a pair of lugs 20, which are adapted to engage notches 21formed on the upper end oli' the cylindrical portion of the cup. Theupper end of the cup is provided with inclined portions 22, connected tothe notches, and it will be apparent that when the lugs 20 ride overthese inclined portions and pass the notches 21, it is impossible toturn the locking member and plug in a reverse direction to release theplug.

Means are provided for releasing the locking member when desired. A sshown, a sleeve 23 surrounds the cylindrical portion of the cup, theupper edge of the sleeve engaging the flange 19. The lower edge of thesleeve is provided with cutout portions forming notches 2i and cams 25.A notch 26 is provided at the opposite end of the cam which is of lessdepth than the notch 2i. The bottom of the cylindrical portion of thecup is provided with lugs 27 adapted to enter the notches 24C. Thesleeve may be provided with openings 28 Jfor the reception ot' a wrenchor other tool.

in operation, the cup is filled with grease, and the parts assembled, asshowin in Figures 1 and 2. 1When the plug has been inserted to the depthshown, the lugs 20 are in engagement with the notches 21 and movement ofthe locking member and plug in a reverse direction is prevented. Thelocking member, however, is capable of vertical movement with respect tothe plug but is normally retained in lowered position by spring 17. Whenthe cup is to be opened, the locking member is first raised through themedium of the sleeve 23. When the parts are in assembled position, thelugs 27 are received in the notches 24C, as shown in Figure l of thedrawings. By placing a suitable tool in the openings 28 and revolvingthe sleeve, the sleeve rides upwardly due to the engagement of the camportion 25 and the lug 27. This raises the locking member 12, anddisengages the lugs 2O from the notches 2l which permits the plug andlocking member to be turned in a reverse direction. When the sleeve isrevolved, the legs engage the notches 26 which are ot less depth thanthe notches 24 and which retain the locking member in raised position.

It is to be understood that the form of the invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size, and arrangement ot parts may beresorted to without departing from the spirit or' the invention or thescope oi' the sub-v joined claims.

I claim:

l. A grease cup comprising a casing having internal threads, a threadedplug adapted to be arranged therein, a locking member secured to saidplug, said member being adapted to positively lock said plug againstrotation` saidlocking member being capable of independent reciprocatorymovement longitudinally of said casing, and rotatable means for movingsaid locking member to release said' plug.

2. A `grease cup comprising an outer casing having a threaded opening, athreaded plug mounted therein, a locking member secured thereto, saidlocking member being capable of independent longitudinal movement and arotatable sleeve surrounding said casing and engaging said lockingmember to move it to inoperative position.

3. A grease cup comprising an outer casing, having a threaded opening, athreaded plug adapted to be received in said easing, a locking membersecured to said plug to member being provided with lugs adapted to entersaid notches, and a sleeve surround ing said casing and engaging saidlocking member, said sleeve being provided with cut-out portions on itslower edge and cam portions extending trom said cut-out portions, saidcasing being provided with lugs adapted to be received'in said cut outportions and engage said cam portions when the sleeve is revolved toraise said locking member.

A grease cup comprising a. cylindrical casing having an external lugformed at a point snaced from the top thereot and a notch formed at itsupper end, said casing being internally threaded, a threaded plugadapted to be mounted in said casing, said plug being hollow andprovided with a pol'vgonal opening at its upper end, a locking memberincludino' a polygonal depending extension mounted in the opening insaid plug and provided with an annular flange arranged above said casingand having alug on its under tace adapted to engage the notch in saidcasing, resilient means for normally forcing said locking memberdownwardly, and a rotatable sleeve surrounding said casing, said sleevebeing adapted to contact with the flange of said locking member andbeing provided at its lower end with a notch vhaving an inclined faceand adapted to receive the external lug on said casing.

In testimony whereof I aiiiX my signature in presence of two witnesses.

FRANK SliII'lH.

. Barinas, JAL/rits Benni?.

